Bolster.



PATENTED JULY 21, 1903,

T. MITCHELL.

BOLSTER.

APPLICATION FILE-D JUNE 20. 1902.

2 SHEETS-SHEET 1.

NO MODEL,

WITNESSES:

1n: NORRIS PEfiRS CO" WASHINGTON. D c.

No. 734,188. PATENTEDJULY 21, 1903.

.- T. MITCHELL.

BOLSTER.

APPLICATION FILED mm: 20. 1902. no MODEL. V H 2 S EETS-5211mm.

E N (D -1 WITN ESS ES:

No. 734,199. I,

UNITED STATES Patented July 21, 1903.

PATENT OFFICE.

THOMAS MITcHnLL, OF CHESTER, PENNSYLVANIA, ASSIGNOR To DANIEL' EAGA'N,or PHILADELPHIA, PENNSYLVANIA.

BOLSTER.

SI EGIFIGA'IION forming part of Letters Patent No, 734,188, dated July21, 1903.

Application filed Tune 20, 1902.

To all whom it may concern: I

Be it known that I, THOMAS MITCHELL, a citizen of the United States,residing at Chester, in the county of Delaware and State ofPennsylvania, have invented certain new and usefulImprovements inBolsters, of which the following is a specification.

It is the object of my invention to provide a bolster of a form whichmay be advantageously cast as a complete integral structure, and soarranged or conformed that although involving the use of a relativelysmall weight of metal, in its construction, it will' possess greatstrain resisting capacity.

My improved construction is I features applicable in connection witheithe truck or'body'bolsters. n y In the drawings, Figure 1 is a topplan,--Figure 2 a view in side elevation,'Figure 3 a View in underplan,-and, Figure 4. a view in end elevation,-of a truck bolsterembodying my invention.

Figure5 is a transverse central sectional elevation of the same.

- Figure 6 is a view in top plan,+-Figure 7 a view in side elevation,-Figure 8 a view in under plan,-=and, Figure 9 a view inend-elevati0n,--'0f a bodybolster embodying my improvements. v a aFigure 10 is a fragmentary view, illustrat ing the end portion of thebody bolster, as it may, if desired, be conformed, to the moreconveniently receive and support the side sill of the car body.

7 Similar letters of reference indicate corresponding parts.

Referring, first, to'Figures 1, 2, 3, 4, and 5, which exhibit theconstruction of a truck bolster,-a is the top plate provided with thecenter bearing 1), and the side bearings c. Said top plate a may beatany desired conformation, but is preferably slightly wider at the centerthan at its ends.

'The end portions of the bolster are, in transverse section four sided,or as I term it, of box form, and the sides of said box like portions orboxes are provided with the usual column guide ribs e.

The bottoms of said box like portions are designated (1. ware openingsformed in the n itsgeneral Serial No. 112,422. (No model.)

ends of the top plate to lighten the structure.

Between the box like end portions are anrangeda pair of inclined sidewalls; f, the upper edges of which areintegrallyunited with the topplate, and the respective ends of which.

unite with or merge into the side walls (1' of the boxlike ends.

The lines of junction of said inclined side walls with the top plate arewell in from the respective edges of said plate,-and the end portions ofsaid inclined side wallsf curve outwardly quite sharply to unite asstated with the vertical side walls (1 of the box like end portions.

l he inclined arrangement of said side walls f is shown moreparticularly in-Figures 4 and 5, and as therein depicted the upper edgesof said walls are closer together than are their lower edges, said wallsbeing arranged in ap- 7o proximately A-shaped relation.

Preferably the upper edges of the walls f are spaced apart a distanceequal to the external diameter of the king bolt sleeve h aretransversely extending webs or brackets 7 arranged between the king boltsleeve 9 and the side walls f and 'i are webs or bracketsarrangedjbetween the outer faces of the walls f and the under faces ofthe projecting'edges of the top plate, said webs or brackets h 11 80,being, to secure the best results in bracing and tying together themembers of the bolster, arranged in a common transverse plane.

As willbe' understood, the arrangement of said inclined walls f shown,is such as will very firmly brace the diolster against the strain whichit receives in use, and the webs or brackets h i very firmly brace orsupport the central portions of the structure against the specialstrains to which that portion of go the bolster is subjected. v

w are webs, arranged at either sideof the center of the structure, andextending-across from the lower edge of one wall f to the lower edge ofthe other. The webs w serve to very 5 firmly brace the said walls.

In Figures 6, 7, 8, and 9,-1 depict a body bolster embodying certaingeneral features of my invention already described with reference to thetruck bolster. Said body bol- ICL ster is designated j, its top plateis, and its inclined side walls m. The side walls at,

throughout thecentral body of the bolster, bear the same relation to thetop plate It as do the side walls fto the top plate a in the structureshown in Figures 1, 2, 3, 4, and 5. The arrangement of the body bolstershown, however, differs from that of the truck bolster shown, in thatits side walls on continue in their inclined relationship to the end ofthe bolster,said body'bolster not having the box like end portions withvertical sides shown as forming part of the truck bolster. The centerbearing of the body bolster is designated n, and the side bearings o.'

The transversely extending webs of the body bolster arranged between theexternal faces of the walls m and the edges of the top plate k aredesignated 10 and the webs or brackets, in the same transverse plane,arranged between the king bolt sleeve q and the side walls, aredesignated'r.

s are webs of small height extending from the lower portions of one'wallm to the other, at points above'the side bearings, and making connectionwith said side bearings,as shown in Figure 9, said webs sv extend lessthan half the vertical distance from the side bearings to the top plate.

t are webs or brackets ar ranged between the external faces of the sidewalls m and the edges of the top plate, in the same transverse plane asthe webs s.,

As shown in Figure 10, the end of the body bolster may be given anangular or shouldered form to the more conveniently receive and sustaina side sill.

The top plates of the truck and body bolsters are preferably providedwith slight depending fianges or thickened regions, u, extending alongtheir respective edges.-

The truck and body bolsters herein shown and described may each beformed in a single casting operation as a complete integral structure. pI am not the inventor of the broad idea of extending the side plates ortension members of the bolster from the top plate or compression memberin diverging lines, and therefore disclaim the same.

described my invention, -I

2. A metal bolster comprising a top plate,

anda pair of depending side walls arranged in approximately A-shapedrelation, the upper edges of which 'walls unite with said top.

plate at a considerable distance inwardly from the respective edges ofsaid top plate.

A metal bolster comprising a top plate, and a pair of'dependdng sidewalls 'arranged in approximately A-shaped relation, a king bolt sleeve,and webs and brackets connect- Y ive of said king bolt sleeve and saidside walls. l

' 4. A metal bolster comprising a top plate, and a pair of dependingside walls arranged in approximately A-shaped relation, the centralportion of which top plate has flanges or edges which extendontwardbeyond the upper portions of the side walls, and a pair of webs whichrespectively connect the respective edges of the top plate to therespective side walls.

5. In a metal bolster, in combination, a top plate, a pair of dependingside walls arranged in approximately A-shaped relation, the centralportion of the top plate having flanges which extend beyond the upperportions of the respective side walls, a king bolt sleeve,

a pair of webs which respectively connect.

each an edge of the top plate to one of the side walls, and a pair ofwebs which respectively connect said king bolt sleeve to the respectiveside walls.

6. A bolster embodying a top plate, depending inclined side platesarranged intermediate of their length in approximately A- shapedrelation, and depending vertical side walls at its end portions, saidinclined walls merging into said vertical walls. 4

. 7. A bolster having a top plate, depending inclined side wallsarranged in approkimately A-shaped relation, and box .like portions atits respective ends, said inclined sidewalls merging into the side wallsof the boxes, said inclined walls curving sharply away from each otherclose to their points of junction with said side walls of the boxes, andarranged with their bodies in approximate parallelism.

8. In a bolster, in combination, a top plate, box-like structures at therespective ends of the plate, depending inclined side walls intermediateof said box-like structures, and arranged in approximately A-shape'drelation, the upper edges of which inclined side walls ;are set inwardfrom the respective edges of the to plate, and which inclined wallsmerge into t 9 side walls of the box-like structures, a king boltsleeve, a pailof webs or brackets eachof which connects one of therespective inclined walls with the king bolt sleeve, and another pair ofwebs or brackets each of which connects one of the inclined side wallswith the adjacent overhanging dge of the top plate, substantially as setforth. 4

9. A bolster having a top plate, depending in'clined side wallsarrangedin A-shaped relation, box like 'ends into the side walls ofwhich said inclined side walls merge, and a pair of webs connective ofthe lower edges of the two inclined side walls.

10. In atruck bolster, in combimitionya top plate, depending side wallsat the respective ends of the plate, arranged at the respective edges ofthe'plate, depending side walls, in termediate of the first mentionedside walls outwardly inclined from their upper to their mentioned sidewalls are set'inward from the I respective edges of the top plate, andwhich last mentioned walls merge in to the first mentioned side walls, aking bolt sleeve, and a pair of webs or brackets arranged at theiongitudinal center of the bolster, and each' arranged to connect one ofthe side walls with the adjacent overhanging edge of the top plate. I I11. A bolster consisting of a compression member, tension membersdiverging from said compression member, and heads at the ends of saidbolster, substantially as set forth. 12. A bolster consisting of acompression member, tension members diverging from said compressionmember, heads at the ends of said bolster, side bearings surmounting thebolster, and a center bearing located at the longitudinal center of saidcompression mem ber, substantially as setforth.

13. A bolster-consisting of a'compression member, tension membersdiverging. from said compression member, heads at the ends of thebolster, and column guides carried by said heads, substantially as setforth.

In testimony that I claim the foregoing as my invention I have hereuntosigned my name this 12th day of June, A. D. 1902.

THOMAS MITCHELL.

S. SALOME BROOKE.

